CN113375261A - Indoor air filtering system - Google Patents

Indoor air filtering system Download PDF

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Publication number
CN113375261A
CN113375261A CN202110655259.XA CN202110655259A CN113375261A CN 113375261 A CN113375261 A CN 113375261A CN 202110655259 A CN202110655259 A CN 202110655259A CN 113375261 A CN113375261 A CN 113375261A
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water
air
pipe
filter
pipeline
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CN202110655259.XA
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CN113375261B (en
Inventor
徐俊超
刘昊鑫
邵倩妮
孙泽司
赵华英
郑小草
包向军
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Anhui University of Technology AHUT
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Anhui University of Technology AHUT
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/117—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering
    • F24F8/125—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering using wet filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/003—Ventilation in combination with air cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Central Air Conditioning (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention discloses an indoor air filtering system, and belongs to the field of air purification. The system comprises: the fresh air system comprises a water-based coil pipe filter, an air inducing device, an air supply pipeline and an air outlet pipeline, wherein the air supply pipeline, the water-based coil pipe filter and the air outlet pipeline are sequentially communicated, and the air inducing device is arranged in the air supply pipeline; the water-based coil pipe filter comprises a water-based filter pipe and a water vapor supplement pipe, wherein a microporous flexible lining is arranged in the water-based filter pipe, and the water vapor supplement pipe is communicated to the outer wall of the water-based filter pipe through a plurality of water vapor supplement branch pipes which are connected in parallel; and the temperature adjusting system comprises a water bath tank with adjustable water temperature, and the water-based coil pipe filter is arranged in the water bath tank. The invention has the advantages of high dust removal efficiency, small airflow resistance, large air volume, low noise, no blockage of airflow channels after long-time use and the like.

Description

Indoor air filtering system
Technical Field
The invention relates to the field of air purification, in particular to an indoor air filtering system.
Background
Environmental problems caused by the growing severity of haze weather have become a focus of social and public attention. The particulate matter is an important component of haze weather, has small particle size and is easy to carry toxic substances. The particles can penetrate into the respiratory tract of a human body through breathing, and damage the respiratory system, the nervous system, the immune system and the like of the human body. Statistically, people are active indoors for 80% of the day, however, indoor air quality problems also exist, and outdoor is a major source of indoor particulate pollution. Compared with outdoor particulate matter pollution, the indoor particulate matter has the characteristics of easiness in control, long exposure time of personnel and the like, so that the development of the prevention and control of the indoor air particulate matter is an important way for reducing the risk of diseases induced by the particulate matter, and the health effect is obvious.
Conventional air filters filter particles from the flowing air primarily by a sieving effect, an interception effect. For example: an existing HEPA filter (No. CN205182399U, No. 2016.04.27) comprises a frame and a plurality of HEPA filter sheets, wherein a V-shaped structure is formed between every two adjacent HEPA filter sheets, the HEPA filter sheets are integrally combined into a wave-shaped structure, and the wave-shaped structure is fixedly arranged in the frame to form an air purification unit. Also, an air sterilizing and purifying system and a space sterilizing machine (application publication No. CN111829101A, application publication date: 2020.10.27) wherein the space sterilizing machine is disclosed, comprising a shell, the shell is provided with an air inlet and an air outlet, and a primary filter screen, a plasma high-voltage electric field device, an anatase catalyst net, an ultraviolet lamp, a copper-silver nano composite catalyst net, an activated carbon net and a HEPA air filter are sequentially arranged between the air inlet and the air outlet inside the shell.
The air purification device has the advantages of high efficiency, large dust holding capacity and the like, and is widely applied to occasions such as a central air conditioner, a sterile room, a hospital and the like. However, as the filtering time increases, gaps between fibers of the HEPA filter screen become smaller and smaller, and some gaps disappear completely, so that not only the filtering efficiency is reduced, but also the wind resistance of the filter screen is increased, which directly results in the reduction of the air volume passing through the HEPA filter screen, and simultaneously, the noise is also increased, so that the HEPA filter screen needs to be replaced at regular time, and the use cost is increased.
Disclosure of Invention
In view of the above problems in the prior art, there is a need to provide a solution.
Based on the air filtering system, the invention provides an indoor air filtering system, which comprises a fresh air system and a temperature adjusting system; the fresh air system comprises a water-based coil pipe filter, an air inducing device, an air supply pipeline and an air outlet pipeline, wherein the air supply pipeline, the water-based coil pipe filter and the air outlet pipeline are sequentially communicated, and the air inducing device is arranged in the air supply pipeline; the water-based coil pipe filter comprises a water-based filter pipe and a water vapor supplement pipe, wherein a microporous flexible lining is arranged in the water-based filter pipe, and the water vapor supplement pipe is communicated to the outer wall of the water-based filter pipe through a plurality of water vapor supplement branch pipes which are connected in parallel; the temperature adjusting system comprises a water bath tank with adjustable water temperature, and the water-based coil pipe filter is arranged in the water bath tank.
In the indoor air filtering system, the water is supplemented into the water-based filtering pipe through the water vapor supplementing pipe, so that the microporous flexible lining in the water-based filtering pipe is kept in a wet state, meanwhile, the water-based filtering pipe is heated or cooled through the water bath box, a proper temperature difference is generated inside and outside the water-based filtering pipe, and a water vapor supersaturated environment is constructed inside the water-based filtering pipe. After air is introduced into the air supply pipeline through the air inducing device, the air enters the water-based filter pipe through the air supply pipeline, under the promotion of a water vapor supersaturated environment in the water-based filter pipe, dust particles in the air are combined with water vapor, the particle size of the particles is increased and the particles collide with each other for condensation, and large particles with high viscosity are formed; then, in the process of moving along with the airflow, the grown particles collide and adhere to the microporous flexible lining in the water-based filter pipe under the action of gravity and the like, so that the aim of filtering air is fulfilled; and finally, discharging the clean air generated after the water-based filtering pipe is filtered through the air outlet pipeline. In the scheme, fine particles in the air grow continuously, so that the fine particles are easier to be trapped by the microporous flexible lining; the surfaces of the microporous flexible lining and the dust particles are in a wet state, so that the adhesion effect between the microporous flexible lining and the dust particles is improved; therefore, the dust removal efficiency is obviously improved compared with the traditional HEPA filter. In addition, the inner diameter of the water-based filter pipe is far larger than the aperture of a filter layer in the HEPA filter, the air flow resistance is small, the air quantity is large, the noise is low, the condition of blocking of an air flow channel cannot occur even if the water-based filter pipe is used for a long time, and the cleaning and replacing frequency is greatly reduced.
Furthermore, the temperature regulating system also comprises a temperature regulating device for regulating and controlling the temperature of the water in the water bath tank.
Furthermore, a primary filter screen is arranged in the air supply pipeline to preliminarily filter air entering the system, so that the dust removal burden of the water-based coil pipe filter is reduced, and the service life is prolonged.
Furthermore, a flow monitoring unit, a first humidity monitoring unit and a first temperature monitoring unit are arranged in the air supply pipeline. The first humidity monitoring unit and the first temperature monitoring unit are respectively used for detecting the temperature and the humidity of air in the air supply pipeline so as to provide data support for the water bath box to regulate and control the temperature and construct the internal supersaturated environment of the water-based filter pipe. The flow monitoring unit is used for monitoring the airflow flow of the system, so that the induced draft device is controlled to adjust the flow in time when needed.
Furthermore, the air outlet pipeline comprises an air outlet main pipeline and an air outlet branch pipeline, and a first adjusting valve and a second humidity monitoring unit are arranged in the air outlet main pipeline; the air outlet branch pipeline is connected with the first regulating valve in parallel, and a second regulating valve and a dryer are arranged in the air outlet branch pipeline. When the second humidity monitoring unit monitors that the air outlet humidity is too large, the first adjusting valve is controlled to be closed, and the second adjusting valve is opened simultaneously, so that the air flow enters the dryer in the air outlet branch pipeline for drying, the air outlet humidity is reduced, and the comfort level of the environment is improved.
Furthermore, the outlet of the air outlet pipeline is also provided with a second temperature monitoring unit for detecting the air outlet temperature, so that the air outlet temperature is ensured to be within a reasonable temperature range, and the comfort level of air outlet is further ensured.
Furthermore, the fresh air system comprises a plurality of water-based coil filters, the water-based coil filters are arranged in parallel and are respectively connected with the air supply pipeline and the air outlet pipeline through a gas distribution pipe and a gas collection pipe. The device can disperse air flow, improve dust removal efficiency and increase circulating air volume.
Further, the inner diameter of the water-based filter pipe is 20-25 mm, and the length of the water-based filter pipe is more than or equal to 6 m; the inner diameter of the water vapor replenishing branch pipe is 3-5 mm, and 4-6 water vapor replenishing branch pipes are distributed per meter in the extending direction of the water-based filter pipe. The water-based pipeline filter adopting the water-based filter pipe with the specification is suitable for household use.
Furthermore, the water-based filter pipe is an S-shaped coil pipe, so that the installation space occupation of the water-based filter pipe can be reduced under the condition of ensuring the length.
Further, the water vapor supplement branch pipes are uniformly distributed along the extension direction of the water-based filter pipe, so that uniform water vapor supplement is provided in the extension direction of the water-based filter pipe.
Drawings
FIG. 1 is a schematic view of an indoor air filtration system of the present invention;
FIG. 2 is a schematic cross-sectional view of a water-based coiled tubing filter;
FIG. 3 is a schematic diagram of a water-based coil filter parallel configuration;
FIG. 4 is a schematic view of an air outlet pipeline;
in the drawings: 1. a fresh air system; 11. a water-based coiled tubing filter; 101. a gas distributing pipe; 102. a gas collecting pipe; 111. a water-based filter tube; 112. a microporous flexible liner; 113. a water vapor replenishing pipe; 114. a water vapor replenishing branch pipe; 12. a primary filter screen; 13. an air inducing device; 14. a flow monitoring unit; 15. a first humidity monitoring unit; 16. a first temperature monitoring unit; 17. a supply air line; 18. an air outlet pipeline; 181. a main air outlet pipeline; 182. a second humidity monitoring unit; 183. a first regulating valve; 184. an air outlet branch pipeline; 185. a dryer; 186. a second regulating valve; 187. a second temperature monitoring unit;
2. a temperature regulating system; 21. a water bath tank; 22. a temperature adjusting device.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.
Examples
Referring to fig. 1 to 3, the present embodiment provides an indoor air filtering system, which includes a fresh air system 1 and a temperature adjusting system 2. The fresh air system 1 comprises a water-based coil pipe filter 11, an air inducing device 13, an air supply pipeline 17 and an air outlet pipeline 18, the air supply pipeline 17, the water-based coil pipe filter 11 and the air outlet pipeline 18 are sequentially communicated, and the air inducing device 13 is arranged in the air supply pipeline 17. The water-based coil pipe filter 11 comprises a water-based filter pipe 111 and a steam replenishing pipe 113, wherein the water-based filter pipe 111 is internally provided with a microporous flexible lining 112, and the steam replenishing pipe 113 is communicated to the outer wall of the water-based filter pipe 111 through a plurality of parallel steam replenishing branch pipes 114. The temperature adjusting system 2 comprises a water bath tank 21 with adjustable water temperature, and the water-based coil filter 11 is arranged in the water bath tank 21.
One specific implementation is as follows: the air inducing device 13 is a fan; the water introduced into the water vapor replenishing pipe 113 is distilled water added with a disinfectant so as to prevent sediment impurities from being brought into the water-based filtering pipe 111 and prevent bacteria from breeding in the water-based filtering pipe 111 so as to prevent secondary pollution to the airflow; the microporous flexible liner 112 is a filter sponge or felt, and other materials with the same characteristics can also be adopted; in addition, an independent controller module is further arranged and used for controlling the fresh air system 1 and the temperature adjusting system 2 so as to realize the cooperative work of the fresh air system and the temperature adjusting system.
In the indoor air filtering system, the temperature inside the water-based filtering pipe 111 is adjusted through heat exchange of the water bath tank 21, so that a proper temperature difference is generated inside and outside the water-based filtering pipe 111, and meanwhile, water is supplemented into the water-based filtering pipe 111 through the water vapor supplementing pipe 113, so that the microporous flexible lining 112 inside the water-based filtering pipe 111 is kept in a wet state, and further, the water vapor supersaturation of the internal environment of the water-based filtering pipe 111 is achieved under a specific temperature difference. After being introduced into the air supply pipeline 17 through the air inducing device 13, the air enters the water-based filter pipe 111 through the air supply pipeline 17; after air enters the water-based filter pipe 111, in a supersaturated environment, when the supersaturation degree of water vapor is higher than the critical supersaturation degree of air particles, the water vapor takes the particles as condensation nuclei to generate phase change to form liquid drop embryos, so that the particle size and the mass of the particles are increased, and large particles with strong viscosity are formed; then, in the process of traveling along with the airflow, the grown particles collide and adhere to the microporous flexible lining 112 in the water-based filter pipe 111 under the action of gravity and the like, so that the aim of filtering air is fulfilled; finally, the clean air generated after being filtered by the water-based filtering pipe 111 is discharged through the air outlet pipeline 18.
When the indoor air filtering system is used for purifying air, fine particles in the air are continuously grown and are more easily trapped by the microporous flexible lining 112; and the microporous flexible liner 112 and the dust particle surface are in a wet state, so that the adhesion effect between the two is increased. Therefore, the dust removal efficiency is obviously improved compared with the traditional HEPA filter. In addition, the inner diameter of the water-based filter pipe 111 is far larger than the aperture of a filter layer in the HEPA filter, the air flow resistance is small, the air volume is large, the noise is low, the condition of blocking of an air flow channel cannot occur even if the water-based filter pipe is used for a long time, and the cleaning and replacing frequency is greatly reduced.
In order to realize the adjustable water bath temperature in the water bath tank 21, the temperature adjusting system 2 further comprises a temperature adjusting device 22, and the temperature of the water in the water bath tank 21 is adjusted and controlled by the temperature adjusting device 22 so as to provide temperature support for constructing a supersaturated environment. In this embodiment, the temperature adjustment device 22 is a cooling and heating air conditioning system, and the output water bath temperature satisfies: when T is0T is less than 15 ℃ and less than or equal to 45 DEG C1Less than or equal to 50 ℃; when the temperature is less than or equal to 15 ℃ and T is less than or equal to0T is less than 20 ℃ and less than or equal to 40 DEG C1Less than 45 ℃; when the temperature is less than or equal to 20 ℃ and T is less than or equal to0T is less than 26 ℃ and less than or equal to 9 DEG C1Less than or equal to 12 ℃; when T is0T is not less than 7 ℃ and not more than 26 DEG C1Less than 9 ℃; wherein, T0Is ambient temperature; t is1The temperature of the water bath. Through the reasonable water bath temperature of selecting, obtain the efficient heat transfer when constructing the supersaturated environment, can heat the air-out temperature or reduce to the reasonable temperature interval of 18 ~ 24 ℃, improve the comfort level of air-out. It will be appreciated that the temperature conditioning device 22 may also be a combination of a refrigeration device and an electric heater. In addition, a heating facility interface is also provided on the water bath tank 21, and the water bath tank can operate in cooperation with a heating facility, and the temperature of water in the water bath tank 21 can be adjusted by the heating facility when the ambient temperature is too low in winter.
If the air is directly sent into the water-based coil filter 11, large particles of dust, fibers, etc. in the air will be attached to and accumulated on the inner wall of the water-based filter tube 111, which will greatly reduce the filtering efficiency of the water-based coil filter 11, and further shorten the cleaning and replacing period. In order to solve the problem, a primary filter screen 12 is arranged in the air supply pipeline 17 to primarily filter air entering the system, prevent large-particle dust, fibers and the like from entering the water-based filter pipe 111, reduce the dust removal burden of the water-based coil pipe filter 11 and prolong the service life. To facilitate the removal of the primary screen 12, it is arranged at the inlet of the supply duct 17.
A first humidity monitoring unit 15 and a first temperature monitoring unit 16 are arranged in the air supply pipeline 17, the first humidity monitoring unit 15 is used for detecting the inlet air humidity of the system, and the first temperature monitoring unit 16 is used for detecting the inlet air temperature. The detected temperature and humidity parameters are fed back to the controller module, and the controller module regulates and controls the temperature of the water in the water bath tank 21 according to the temperature and humidity parameters, so that the water bath tank is suitable for constructing the water vapor supersaturation environment under the environment working condition. In addition, a flow monitoring unit 14 is further disposed in the air supply pipeline 17, and the flow monitoring unit 14 is used for monitoring the real-time flow of the system airflow. The real-time flow parameters are fed back to the controller module, which sends instructions to the induced draft device 13 when needed, and flow adjustments are made in time.
Because the indoor air filtering system of the invention promotes the growth of the particles in the air by constructing the water vapor supersaturated environment to improve the removal efficiency of the particles, the air outlet humidity is too high in some times, and the comfort level of the environment is reduced. In order to solve the problem, the air outlet pipeline 18 is designed to include an air outlet main pipeline 181 and an air outlet branch pipeline 184, and the air outlet main pipeline 181 is provided with a first regulating valve 183 and a second humidity monitoring unit 182; the air outlet branch pipe 184 is connected in parallel with the first adjusting valve 183, and a second adjusting valve 186 and a dryer 185 are arranged in the air outlet branch pipe 184. When the second humidity monitoring unit 182 monitors that the outlet air humidity is too high, the first adjusting valve 183 is controlled to be closed, and the second adjusting valve 186 is simultaneously opened, so that the airflow enters the dryer 185 in the outlet air branch pipeline 184 for drying, and the outlet air humidity is reduced, so that the comfort level of the environment can be improved. When the outlet air humidity is appropriate, the outlet branch pipeline 184 is closed by closing the second regulating valve 186, so that the fresh air is completely sent out through the outlet main pipeline 181. It can be understood that, the flow distribution of the main outlet air pipeline 181 and the branch outlet air pipeline 184 can also be controlled by adjusting the opening degrees of the first adjusting valve 183 and the second adjusting valve 186, so as to adjust the outlet air humidity.
In addition, the outlet of the air outlet pipeline 18 is also provided with a second temperature monitoring unit 187, the second temperature monitoring unit 187 is used for detecting the air outlet temperature so as to feed back the air outlet temperature to the controller module, the controller module sends an instruction to the air inducing device 13, the air supply quantity of the air inducing device 13 is reasonably adjusted, the air speed in the water-based filter pipe 111 is in a reasonable interval, the sufficient heat exchange time is ensured, the reasonable air outlet temperature interval is further reached, and the air outlet comfort level is further ensured.
The first humidity monitoring unit 15 and the second humidity monitoring unit 182 are hygrometers, humidity sensors, etc., the first temperature monitoring unit 16 and the second temperature monitoring unit 187 are thermometers, temperature sensors, etc., and the flow rate monitoring unit 14 is a flowmeter, a flow rate sensor, etc.
If the fresh air system 1 adopts the single water-based coil pipe filter 11 for filtering, the dust removal load is large, the circulating air volume is greatly limited, and the dust removal efficiency is relatively low when the fresh air system is applied to dust removal in a large room. To solve this problem, the fresh air system 1 comprises a plurality of the water-based coil filters 11, and the water-based coil filters 11 are arranged in parallel. Specifically, after being connected in parallel, a plurality of water-based coil filters 11 are connected in parallel, one end of each water-based coil filter is connected with the air supply pipeline 17 through an air distribution pipe 101, and the other end of each water-based coil filter is connected with the air outlet pipeline 18 through an air collection pipe 102. The air sent in through the air supply pipeline 17 is divided by the air distribution pipe 101, enters different water-based coil pipe filters 11 for filtering, and then is converged by the air collection pipe 102 and then is sent out. After the arrangement, airflow is filtered in a splitting mode, so that on one hand, the dust removal load of a single water-based coil filter 11 is reduced, the cleaning and replacing period of the water-based coil filter 11 is prolonged, on the other hand, the dust removal efficiency is further improved, and meanwhile, the circulating air volume is increased.
In order to provide suitable humidity conditions for creating a supersaturated environment, the vapor replenishment branches 114 are uniformly distributed along the extension direction of the water-based filtering pipe 111, and provide uniform vapor replenishment for the microporous flexible liner 112 along the extension direction of the water-based filtering pipe 111.
In a preferable embodiment, the inner diameter of the water-based filtering pipe 111 is 20-25 mm, and the length is more than or equal to 6 m; the inner diameter of the water vapor replenishing branch pipe 114 is 3-5 mm, and 4-6 water vapor replenishing branch pipes 114 are distributed per meter in the extending direction of the water-based filter pipe 111. A water-based pipe filter using the water-based filter pipe 1 of this specification is suitable for domestic use. In the fresh air system 1 in this embodiment, five groups of water-based coil filters 11 of the specification are connected in parallel, and are suitable for a fresh air system with an area of 20m2Air filtration of the left and right rooms. It will be appreciated that the size of the water-based coil filter 11 may be increased or decreased as desired in different applications.
As follows, the air purification effect of the indoor air filtration system was experimentally verified. The height of the test room is 2.8m, and the area is 20m2Run for 1.5 hours, the test results are shown in table 1 below:
TABLE 1 purification Effect of indoor air filtration System on particulate matter in test Room
Figure BDA0003112436850000061
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims (10)

1. An indoor air filtration system, comprising:
the fresh air system (1) comprises a water-based coil pipe filter (11), an air inducing device (13), an air supply pipeline (17) and an air outlet pipeline (18), wherein the air supply pipeline (17), the water-based coil pipe filter (11) and the air outlet pipeline (18) are sequentially communicated, and the air inducing device (13) is arranged in the air supply pipeline (17); the water-based coil pipe filter (11) comprises a water-based filter pipe (111) and a water vapor supplement pipe (113), wherein a microporous flexible lining (112) is arranged in the water-based filter pipe (111), and the water vapor supplement pipe (113) is communicated to the outer wall of the water-based filter pipe (111) through a plurality of water vapor supplement branch pipes (114) which are connected in parallel; and
a tempering system (2) comprising a water bath tank (21) with adjustable water temperature, the water-based coil filter (11) being arranged inside the water bath tank (21).
2. An indoor air filtering system according to claim 1, characterized in that the tempering system (2) further comprises a tempering device (22) for regulating the temperature of the water in the water bath tank (21).
3. An indoor air filtering system according to claim 1, characterized in that a primary screen (12) is provided in the blast duct (17).
4. An indoor air filtering system according to claim 1, wherein a flow rate monitoring unit (14), a first humidity monitoring unit (15) and a first temperature monitoring unit (16) are provided in the blast duct (17).
5. The indoor air filtering system according to claim 1, wherein the air outlet pipeline (18) comprises an air outlet main pipeline (181) and an air outlet branch pipeline (184), and the air outlet main pipeline (181) is provided with a first regulating valve (183) and a second humidity monitoring unit (182); the air outlet branch pipeline (184) is connected with the first regulating valve (183) in parallel, and a second regulating valve (186) and a dryer (185) are arranged in the air outlet branch pipeline (184).
6. An indoor air filtering system according to claim 5, wherein the outlet of the outlet duct (18) is further provided with a second temperature monitoring unit (187).
7. An indoor air filtering system according to any one of claims 1 to 6, wherein the fresh air system (1) comprises a plurality of the water-based coil filters (11), and a plurality of the water-based coil filters (11) are arranged in parallel and are respectively connected with the air supply pipeline (17) and the air outlet pipeline (18) through an air distribution pipe (101) and an air collection pipe (102).
8. An indoor air filtering system according to claim 7, wherein the water-based filtering pipe (111) has an inner diameter of 20-25 mm and a length of 6m or more; the inner diameter of the water vapor replenishing branch pipe (114) is 3-5 mm, and 4-6 water vapor replenishing branch pipes (114) are distributed per meter in the extending direction of the water-based filter pipe (111).
9. An indoor air filtering system according to claim 8, wherein the water based filter tube (111) is an S-coil.
10. Indoor air filtering system according to claim 8, characterized in that the moisture replenishment branches (114) are evenly distributed along the extension of the water-based filtering pipe (111).
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